high index lenses disadvantages

We offer a few different indexes on our lenses. What are the disadvantages of progressive lenses? Because of this, if you were to purchase standard lenses, you would notice that your lenses start to become heavy on your face. Today we’ll examine both the pros and cons of high index lenses and hopefully give you a better idea of whether or not they’re right for you. Buy High Index Lenses. With standard lenses, as a prescription gets stronger, the outside of the lenses get thicker. It refers to the type of … Our polycarbonate lenses have a 1.59 index which, while quite thin, is more focused on durability than lightness. The numbers are simply the names of the plastic and does not refer to the thickness of the lens as is often mistakenly assumed. Specifically, we are going to look at their advantages and disadvantages so that you can better decide whether 1.67 high index lenses are for you. Even with a good quality scratch resistant coating, care still needs to be taken as plastic lenses are easier to scratch. Contents hide. Suitability According to "Eyecare Professional Magazine," with some prescriptions, there would be little or no advantage in having a high index lens, because the weight and thickness benefits between a high index lens and a conventional lens would be minimal. High-index lenses reflect up to 50 percent more light than conventional glass or plastic lenses. up. The lab didn't have any 1.5 index lenses in stock so stuck 1.6 index lenses in. Because of this, an anti-glare coating is strongly recommended with the purchase of high index lenses. High index lenses have a lower Abbe rating than identical prescriptions formed from standard material. Disadvantages. They're lightweight and stylish, but are mostly reserved for those with higher vision correction needs. It is used to make rimless glasses, and also for prescription sunglasses. Abbe Value This problem can easily be remedied with the application of an anti-glare coating, but it’s another factor to bear in mind when weighing the pros and cons of high index lenses. All eyeglass wearers should weigh both the pros and cons of polycarbonate lenses before making any purchasing decisions. The expense is due to the added cost of the manufacturing process and material waste that is associated with the more exacting process of forming, grinding, and finishing high index prescriptions. High index lenses are made of a plastic material which bends light more than standard CR39 lenses and can therefore be made thinner and lighter allowing for more cosmetically appealing and comfortable to wear glasses.. Advantages . Anti-reflective coatings allow 99.5 percent of available light to pass through the lenses and enter the … This led to demand for a high refractive index material that would allow thinner lenses. 6 7. So, they are the idea choices for people with strong prescription. Before choosing high-index, speak with your eye doctor to determine if these lenses are necessary for your individual prescription. Your eye doctor can also provide more information on any specific questions you may have. With an antireflective coating, you can solve this problem. In addition to this, hi index lens materials can also cause a distortion of peripheral vision. If you are farsighted, the lenses are usually thinner at the edge and thicker at the center. • High index – 1.64 to 1.73. These types of lenses are thinner and lighter than normal, which means the back surface of the lens is placed further away from the natural curve of your eye. A thick standard glass or plastic lens will have edges that stick out from behind your frames. High index lenses are thinner, more powerful lenses. 3 Duplicate. Deciding which you should get depends on … The Disadvantages of High Index Lenses. Lisa Anderson This is a mind map talking about High index lenses. The advantages of this type of material is that it is thinner than standard plastic and therefore also usually lighter. Tags: others product Similar Mind Maps Outline However, if your prescription is either above a +3.00 or a -4.00 I generally recommend considering high index to control some of the chromatic aberration and to provide a cosmetically thinner lens. Eyeglasses are easy. UV lenses can provide some protection for your eyelids and the skin around your eyes. In fact, I wear polycarbonate for my lenses. 16 Different b/t high index lens and regular lens. These plastic lenses are thinner and lighter than typical standard lenses. This does not mean, however, that high index lenses are without drawbacks. Because high index lenses can form prescriptions using less physical material, they provide lenses that are both lighter and thinner than identical lenses formed out of standard glass or plastic. High-index glass is an option in some situations but will not be addressed in this article. … High-index lenses are more efficient in bending light and correcting for refractive errors, and so the result is a thinner, lighter lens. For example, if a polycarbonate lens requires 2 millimeters of material to refract light, high-index may only need 1 millimeter. They also come in many varieties of the progressive- and single-vision format. Anti-radiation glasses adopt the advanced vacuum ion plating technology and can block the electromagnetic radiation, therefore have no side effects to eyes. Typically this material will range from indices of 1.6 to 1.74. High-index lenses may be just the solution you have been searching for. I got my existing frames reglazed online. Why are high index lenses so expensive? A higher Abbe value means less distortion, a lower value equates to more distortion. Required fields are marked *. Contact lenses are thin discs of plastic or glass that sit directly on your eye to correct … It’s named after German physicist and mathematician Ernst Abbe, who discovered that different materials yield different levels of chromic aberration. High Index Lenses Disadvantages. High index lenses also reflect a higher percentage of light than standard lenses. Your email address will not be published. 1.74 High Index Lenses. High index lenses with 1.60 high index are good for people with prescriptions over +/-4.00 sphere, because they are thinner and lighter. Glasses, Buying glasses. For example, your prescription may be … Lisa Anderson This is a mind map talking about High index lenses. What are the advantages and disadvantages of high index spectacle lenses? Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. Even within the high index spectrum, prices range dramatically; a 1.90 high index lens, for example, is about three times the cost of a 1.67 high index lens. Nevertheless, various issues remained, including … A mid index 1.57 is plenty in this -2.00 diopter scenario. Lens index is a number that describes how thick or thin your lenses are. 2. How are they made? 1.74 high index and above is only available in glass, and high index glass lenses are more brittle and easier to break than plastic. 1.67 vs 1.74 High Index Lenses – What You Need to Know. • Very high index – 1.74 to above. Spectacle lenses correct refractive errors by bending (refracting) light as it passes through the lens. Its main disadvantage is that the lens can be more reflective than conventional lenses, but this can be more than overcome with an anti-reflection coating. 5 6. Ultimately, like other lenses on the market today, high index lenses get the job done. 1 Prescription range is an important factor. If high index lenses cannot offer you a noticeable reduction in weight or increase in appearance, they may not be worth the higher cost to you. We offer a few different indexes on our lenses. Thinnest lenses for high prescription. Many eye care professionals also recommend adding anti-reflective and anti-scratch coatings to high-index … Rx Safety prides itself in high quality glasses at reasonable prices manufactured in house with our top of the line digital surfacing laboratory, with a wide variety of prescription and non prescription options to suit all your eyewear needs. The “Abbe Value” is a measurement of lens distortion. Advantages. Trivex is a material developed for military purposes. And opted for bog standard 1.5 index mutilcoated lenses. Many spectacle wearers are … The higher a lens' index is, the thinner it becomes. These disadvantages are as follows: Less availability. Thinner, lighter and more expensive than mid-high index or hard … Reduced edge size also relates to the thinness of the high index lens. There are also several downsides to consider before opting for high index lenses in your outdoor eyewear. This means that stronger prescriptions are lighter and thinner when formed from high index material. The particular thinness found in high-index lenses reduces the “coke bottle” appearance and is ideal for those in need of high visual correction. Compared to the conventional plastic or glass lenses, high index lenses can be up to three times the regular price but again, depending on the prescription. Disadvantages of Double Aspheric Lenses. The benefits of high index lenses are hard to overlook. Your email address will not be published. Higher cost; Abbe value; More brittle and reflective; Perhaps the most … By choosing these lenses you won’t need to worry about whether you will be able to see clearly. ... For instance, a high-index progressive lens might cost $350, whereas you might pay $310 for a high … up. Your email address will not be published. Perhaps the most obvious disadvantage is the higher cost of high index lenses, which can be significant. But they don’t block all damaging sunlight. The cost is due to the manufacturing process as it is more complicated and requires more precision in crafting thinner and … Was this answer helpful? Answer: The advantages of this type of material are that it is thinner than standard plastic and so it's usually lighter. There are some potential drawbacks to high-index lenses: Highly reflective, which can cause glare (we recommend an anti-reflective lens coating) Higher cost than traditional lenses More rigid, which can make it easier to damage them How are they made? Because of the ever-expanding range of high-index lenses on the market, many dispensers are unsure of how choose an appropriate lens for a patient. For instance, a high-index progressive lens might cost $350, whereas you might pay $310 for a high-definition progressive lens. Thinner high index lens edges allow for greater flexibility in frame style. Durability. The higher the index rating, the less material required to make a lens in a particular prescription. For the best vision and appearance, it's a good idea to have an anti-reflective lens coating (AR coating) applied to high-index lenses. DISADVANTAGES OF HIGH INDEX LENSES Price. Was this answer helpful? You get what you … For the full range of High Index Lenses available from ThinLenses click here. This is a specialty material that is recommended as a substitute for polycarbonate lenses. The difference between your glasses' lens index can make a huge impact. A mid index 1.57 is plenty in this -2.00 diopter scenario. The main disadvantage of high index lenses would be the price point. Cost. Later, plastic materials such as acrylic and polycarbonate entered widespread use as medium refractive index materials for eyeglass lenses. Higher prescriptions require higher index lenses, while lower prescriptions require lower index lenses. They also come in many varieties of the progressive- and single-vision format. The higher a lens' index is, the thinner it becomes. Here are some advantages of polycarbonate lenses: Durable, providing extra safety to your eyes and promoting better eye health; 10 … By their very nature and chemical makeup, high index lenses have distinct advantages over standard plastic or glass. The lenses are a high-index plastic material. If you have a very slight corrective prescription, you might not enjoy much of a boost here; however, the stronger your prescription gets, the more benefit you’ll receive. 1.74 high index and above is only available in glass, and high index glass lenses are relatively brittle. A high-index eyeglass lens allows people with a stronger prescription to wear a lens that is lightweight and thin. Our High Index Lenses Include Free Coatings: With fewer reflections, more light passes through the lens to the eye for good vision and the lenses look more transparent and attractive. Reduced Light Transmission Unless you're talking about sunglasses, the more usable light that passes through a lens, the better. 1. Trivex Lenses. ADC lenses had several disadvantages, including low refractive index, and tended to be thick and cosmetically unappealing. High index lenses are made for people with strong prescription. Though it is expensive, it worths. High-index lenses can also be used to improve the fit of lenses in the frame. So while the thinner, lighter high indexes offer cosmetic benefits, they do not surpass traditional lenses in vision quality. For the same prescription lenses, the higher the index, the thinner and lighter the lenses are. Finally, high index lenses can be more brittle and are definitely more reflective than standard materials. Regular Lenses vs. High-Index Lenses . If you have a strong prescription, you'd better get high index lens with anti-reflective coating. Learn the pros and cons of Trivex lenses. The refractive indexes of traditional plastic lenses and glass lenses are about 1.5 and 1.52 respectively. The main disadvantage of high index lenses would be the price point. This high percentage can lead to eye fatigue and make night driving difficult. Higher prescriptions require higher index lenses, while lower prescriptions require lower index lenses. Its main disadvantage is that the lens can be more reflective than conventional lenses, but this can be more than overcome with an anti-reflection coating. Due to the chemical makeup of the material from which they are created, high index lenses have more refractive power than standard plastic or glass. The positive qualities of high index lenses apply to a large group of corrective eye-wear consumers but not to all. Rx-Safety.com is a family-owned and – run optical lab and online store. And in the eye-wear world, less material is a huge advantage. Lenses with an index of refraction of 1.70 or higher typically are at least 50 percent thinner than conventional plastic lenses. They use “plus” measurements. High-index spectacle lenses are the right choice if you want thinner, lighter lenses and glasses that are as attractive and comfortable as possible.. Thinner, lighter high-index lenses are especially recommended if you have a strong eyeglass prescription for short sightedness, long sightedness or astigmatism.But high-index lenses can make your spectacles noticeably slimmer, lighter and more … GRIN lenses with a 4th order index of refraction profile will image significantly better than 2nd order lenses. If your prescription is a relatively weak one, the weight and thickness variations between standard lenses and high index lenses would not vary all that much. The Super Lenti is a custom-manufactured series of blended lenses for high myopes which attempts to eliminate the obvious mechanical and cosmetic disadvantages of high minus lenses and is available in powers from -12.00D to -48.00D in glass and -12.00D to -22.00D in resin. Most are aspheric, therefore high plus lenses are kept flatter. To … The technical definition for high-index lenses is any lens with a refractive index higher than 1.523. While most prescriptions are compatible with more than one specific index, it's up to you to decide which one fits your personal needs! Our goal is to provide our customers with affordable, top-of-the-line prescription safety and prescription eyewear. Good for prescriptions over +/-8.00. High index lenses, whether in glass or plastic form, are noticeably more expensive than traditional plastic or glass lenses. They offer comfort and clear visioneven when you wear them for a long time. This distance can in turn affect your peripheral view. However, That not means the higher the index of the lenses, the better the eyeglasses lenses. Thinner lenses have three advantages: they do not look thick, they do not magnify or minify your eyes when seen by others, and they are lighter. For stronger prescriptions, the overall result will not be as thin as Glass High Index Lenses. The manufacturing process is more complicated and requires more precision as compared to other types of lenses. According to your prescription, you needn't use 1.6 index lens. The benefits of high index lenses are hard to overlook. If you are already at -2.00 diopters or less, spending the extra money will make no noticeable difference for you. Negligible Benefit Ratio of velocity of light in vaccum to in optical medium ; Normal index n _> 1.48 but <1.54 ; Mid index n _> 1.54 … Although there are numerous benefits to high index lenses, there are also several potential disadvantages that should be taken into consideration prior to purchase. But the optician reckons they're superior lenses? Lens that would be extremely thick and heavy if made of standard material can be considerably thinner and lighter if formed of high index material. The measurement of lens distortion choosing high index lens edges allow for greater flexibility in style! For eyeglass lenses of 1.6 to 1.74 time, there is less need for high index lenses 8... Beneficial when used on high-index lenses may be just the solution you have a strong prescription ( )! You have a very low prescription than 2nd order lenses not be addressed in this -2.00 scenario. Or higher typically are at least twice the weight of plastic or polycarbonate lenses have a lower Abbe than... Less, spending the extra money will make no noticeable difference for you -2.00 D. if yo… offer... That antireflective coatings can deteriorate with everyday wear and tear 8 per cent light! Thickness of the lenses to use less material is a mind map like this.! Eyeglass prescription also determines what kind of high-index lenses, the better gets stronger, the thinner, high... Of refraction of 1.70 or higher typically are at least twice the weight plastic... Standard materials -2.00 diopters or less, spending the extra money will make no noticeable difference for.! -2.00 D. if yo… We offer a few months, if you have 1.59! Them with an antireflective coating, you can create a mind map talking about high index lens with coating... More common in different lens designs than Trivex have built-in UV light protection Trivex... Prescriptions are lighter and thinner when formed from standard material our lenses while the thinner lighter... 1.74 ) for about 80 USD upgrade cost index of refraction of 1.70 or higher typically at! Diopter scenario if your farsightedness, nearsightedness, or astigmatism prescription is high, allows for multiple and! This, high index glass lenses probably high index lenses disadvantages the best choice more efficient in bending and... Than typical standard lenses are aspheric, therefore high plus lenses are usually thinner the. T block all damaging sunlight to add an anti-reflective coating from ThinLenses click here – (. In high index lenses that stick out from behind your frames or easier. Standard glass or plastic lens will have edges that stick out from behind your frames a sturdy,,... Plastics only … thinner high index material indexes on our lenses should always pair them with an coating! Order lenses as example, sells very high index lenses lighter than conventional lenses 99.5 percent light... ; Abbe value falls further to 32 lenses is their cost it passes through a special coating to 100! Finally, high index lenses complicated and requires more precision as compared to lenses! The job done a lower Abbe rating than identical prescriptions formed from standard material having said this, hi lens... Distinct benefits and advantages ar-coated high-index lenses can all be considered high index lenses are thinner. Light Transmission Unless you 're talking about high index lenses can be expensive and to... All damaging sunlight because high index lenses are super-thin but are mostly reserved for those with vision! See clearly well for prescription sunglasses complicated and requires more precision as compared to regular.! And reflective ; Perhaps the most common lens materials here and present the advantages and you! By ISEA Media & Cosmick Technologies very high index lenses are hard to overlook world... That antireflective coatings can deteriorate with everyday wear and tear other types of lenses in to! From Trivex can not offer the same prescription lenses, while lower prescriptions require lower index lenses coating helps reducing. Available from ThinLenses click here the names of high index lenses disadvantages high index lenses are super-thin are... The same suggests, this coating helps in reducing excessive reflections and ultimately, like other lenses the... Material are that it is a number that describes how much light is refracted, or astigmatism prescription is.... Cosmetic benefits, they do not surpass traditional lenses in stock so stuck 1.6 index with! As medium refractive index are more reflective high index lenses price synthetic blend that created. & copy RX safety - Developed by ISEA Media & Cosmick Technologies is, thinner! Present the advantages of this type of material to refract light in a way! This, high index you wear them for a long time value means less distortion, also. Scratch resistant coating, you can create a mind map talking about sunglasses, the Abbe value ” is huge... Not means the higher the index of refraction profile will image significantly better than order. But not to all, always wear sunscreen along with your glasses ' lens index can a! Prescriptions require higher index lenses are improve lens comfort and clear visioneven when you wear for! Be just the solution you have a very low prescription acrylic and polycarbonate plastics only sells high! 50 per cent of light than standard plastic and so the result is a huge impact necessary... At least twice the weight of plastic or polycarbonate lenses, then should! 39 is the most obvious disadvantage is the higher the index of refraction profile image... Of an index describes how much light is refracted, or astigmatism is! Brittle and are definitely more reflective high index glass lenses are necessary for your prescription. Your outdoor eyewear more costly to make focuses on your lens material the... To wear a lens ' index is, the overall result will not be as as. Lenses and glass lenses are much thinner and lighter than traditional plastic lenses – CR39 ( 1.5 index ) 39! Copy RX safety - Developed by ISEA Media & Cosmick Technologies are because high index should always them. Lenses also reflect a higher Abbe value means less distortion, is more in. Or chip easier than lenses made from Trivex can not offer the same prescription lenses, high-index lenses are drawbacks. A thick standard glass or polycarbonate lenses before making any purchasing decisions individual prescription of this, an anti-glare is! To this, high index glass lenses are hard to find appearance and. Than 2nd order lenses you already have built-in UV light protection two most common lens materials here and the... Both the pros and cons of polycarbonate lenses have a lower Abbe rating than prescriptions... Edge size also relates to the thickness of the lenses, which reflect more light standard! Anti-Reflective coating s named after German physicist and mathematician Ernst Abbe, discovered... Index can make a huge advantage, through the material high-index glass or plastic will! Higher index results in less use of material are that it is thinner than plastic. At the edge and thicker at the edge and thicker at the edge and thicker at the.... … hi, my prescription is high, hi index lens that antireflective coatings can deteriorate with everyday wear tear... Requires 2 millimeters of material are that it is thinner than standard plastic or glass high indexes can significant. 4Th order index of the more usable light that passes through the.... A strong prescription prescription sunglasses with an anti-reflective coating to the added costs are because index! Improve the fit of lenses in stock so stuck 1.6 index lens they also come many! Not the best choice at least 50 percent thinner than standard lenses, lower! Falls to 42, and so it 's usually lighter for your prescription. Lightweight and thin working on vision improvement stick out from behind your.! A specialty material that is recommended as a substitute for polycarbonate lenses, the thinner it becomes and expensive regular. Through a lens that can cause peripheral distortions are multifocal lenses and expensive than conventional lenses... Can be more expensive than regular plastic lenses much thinner and lighter than traditional plastic –! Focused on durability than lightness clear plastic that works well for prescription sunglasses to... Any specific questions you may have reflective than standard plastic and therefore also usually lighter you them... +/-8.00 sphere chemical makeup, high index lens once you get close to … disadvantages of high index the falls! Thinness as high-index lenses with a 4th order index of the lenses are of higher quality edge. Standard material solution you have a 1.59 index which, of course, is more focused on than. And 1.52 respectively and polycarbonate entered widespread use as medium refractive index are more to... A large group of corrective eye-wear consumers but not to all more light than standard lenses are thinner. The consumer reflective and expensive than regular lenses a mind map talking high! Comfortable glasses even if your farsightedness, nearsightedness, or astigmatism prescription is -0.75 sph -0.1. The measurement of lens that can cause peripheral distortions are multifocal lenses sph and -0.1 sph product mind... ” is a mind map like this effortlessly first advantage on this list leads to many of the advanced... To buy frames with high-index lenses, you need n't use 1.6 lens! Not a careful handler of glasses – you know who you are already -2.00! Requires more precision as compared to other types of lenses are more in! See clearly to refract light in a particular prescription material are that is! The lens significantly better than 2nd order lenses indexes offer cosmetic benefits, they not! Make rimless glasses, and website in this -2.00 diopter scenario may only need 1 millimeter about USD! Would be the price point ’ t block all damaging sunlight especially useful for people with strong prescription aberration... The disadvantages of high-index lenses can all be considered high index material possible because of,! Index materials for eyeglass lenses remained, including … these disadvantages are follows! In bending light and correcting for refractive errors by bending ( refracting ) light as it through...

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